Type-writing machine.



E. G. I ATTA.

TYPE WRITING MACHINE.

2 SHEETS-SHEET I.

Patented Aug. 6, 1918.

I I |IIII1IIIIII,IIIIIIIII I IIIIIIIIIIIII ,III Il!! E. G. LATTA. TYPE WRITING MACHINE. APPLICATION FILED ocr. s, 1915.

Patented Aug. 6, 1918 2SHEETS-SHEET 2- nniTiiD sTATiis PATENT onnicii.

EMMIT'G. LATTA, OF SYRACUSE, NEW YORK, ASSIGNOR TO CORONA TYPEWRITER COMPANY, ING., A CORPORATION OF NEW YORK.

Specification of Letters Patent.

TYPE-WRITING MAciiiNn..

Patented Aug. 6, i918.

Original application filed November 2, 1911, Serial No. 658,153.lv Divided and this application led October y6,

v v 1915. serial No. 54,423.

To all 'whomy it muy concern.'

lBe it known that I, EMMIT G. LATTA, a

citizen of the United States, residing at i Syracuse, in the county of Onondaga and State of New York, have invented a new and useful Improvement in Type-Vriting h'lachines, of which the following is a. specification.

`This invention relates to improvements in type-writing machines, and has for one of its objects to improve, in the respects hereinafter described and set forth in the claims, line `spacing mechanisms of that kind in which the act of' setting the carriage back foil a new line simultaneously effects the rotation of the platen the required distance for such new line. Other objects are to make provision for fractional line spacing as well as regular spacing, and also to utilize certain parts of the line spacing mechanism for locking the platen in place in the carriage.

This application is a division of application, Serial No. (358,153, tiled by me Nov. 2, 1911, and the improvements are herein shown and described in connection with the collapsible typewriter disclosed in said application, but the improvements herein claimed are not restricted in application to colla-psihlgtypewriting machines. and except as lhereafterspecified, the machine may ,be of any suitable construction.

In the accompanying drawings consisting of 2 sheets Figure 1 is a fragmentary side elevation of a typewriting machine embodying the invention, showing the same collapsed. Fig. 2 is a sectionalelevation of the platen carriage and platen, as viewed from the rear.

Fig. 3 is a fragmentary plan view of the machine.

Fig. 4 is a sectional elevation of the car riage on line 4 1, Fig. 2.

Fig. 5 is a similar view showing the line .space pawl at the end of its throw.

. Fig. G is an elevation partly in section on line (3 6, Fig. 2. n

p The parts herein shown and described are the same in construction as the correspond-v ing parts in said prior application, and only such parts are illustrated and described as are necessary to a correct understanding of the invention claimed.

A and A represent respectively the stationai'y and movable sections of the collapsible main frame;.B the platen carriage which is arranged to travel crosswise of the machine on a suitable guide track b3 on the rear portion of the frame A, and consists of end plates b connected by suitable bars of which a front bar b2, bottom bars b4, v1f are shown; and b1 the platen journaled on the ends of the carriage; G represents the toothed escapement wheel of the carriage escapement, g the feed pinion, and H the rack bar, which meshes with the feed pinion foi-controlling the feed movements ofthe carriage. The rack bar is secured at its ends to the rear ends of supporting levers z4 and le. The levers L and 71, are pivoted by screws k2 or otherwise to the ends of the carriage and are provided with slots, h3 concentric with their pivots in which screws or pins 71.*, attached to the ends ,of the carriage,

extend to limit the up and down movements of the rack bar. lever L extends under the adjacent end of the platen shaft and upwardly and outwardly in front thereof in position to be engaged and actuated by the line space lever, presently described. A spring r" connected to the lever 71, and to the adjacent end of the carriage acts to yieldingly hold therack bar in rthe normal position shown, ,in which it meshes with the feed pinion.

The line space lever I is shown with a- The forward end of tliejoint to enable it to be folded when collapsing the machine, and its frontV end is of spe- 'cialform to permit it to be'grasped by the thumb and ingers to facilitate its use in tabulating, as explained in said application. sNeither of these features are claimed herein, and for the simple purp4 se of line spacing the lever may be. in one piece extending forwardly from the carriage and having its front end turned down, as shown,- to form a crank by which it may be given a slight rotary or rocking motion for turning the. platen at the same time that the carriage is being` set back for a new line, by means of the lever, as is now commonly done. The

inner part I of the line space leverl is jour naled in a forwardly extending bearing 112 on the end of the carriage and is adapted `to roch therein. a limited distance in opposite directions.v At its rear end, the lever partlf is provided with a T-head which forms 1nwardly and `outward-ly projecting arms or parts 3 and i4. Aleaf spring 5, secured at its forward end to the bearing i2, rests at its free rear end on the flat top of the cross head and acts to return the line space lever c to the normal position when released after being rocked in either direction. i7 represents an auxiliary lever or pan/l carrier which is suitably pivoted at its front end in a lug on the inside of the bearing extension 2 of the end of the carriage and extends rearwardly beneath the platen shaft. A line space pawl 'is is pivoted at its lower end to the` rear end ot' the auxiliary lever and is provided at its upper end with an inwardly projecting tooth or part adapted to engage the teeth of a line space wheel i", Secured to the adjacent end of the platen for turning the latter. The inwardly projecting arm i3 of the line space lever overhangs and is adapted to engage an anti-friction roller 10, suitably journaled on the auxiliary lever, so that by rocking the linespace lever by pushing the depending handle to the right, the auxiliary lever and pawl are actuated to turn the line space wheel and platen. A concealed spring returns the' auxiliary lever and pawl to their normal positions, and another concealed spring holds the pawl against the line space wheel when permitted to do so. The roller 271" is of proper size to substantially till the space between the inner face of the carriage end and the line space wheel and thus prevent lateral nioven'ie'nt of the auxiliary lever. The line space pawl is provided at its uppencnd with an outwardly projecting part i adapted to ride over the curved rear edge of au adjustable guard and platen locking plate im which is arranged against the inner face of the a dj a cent end of the carriage. This plate isniade with an outwardly turned finger `piece 13 at its upper end and with a spring extension 11M, see Fie. Q, acting as a detent which is adapted to snap into either of four notches in the inner face of the end of the carriage concentric with the platen shaft. The guard plate is provided cent ally with-an outwardly projecting tubular flange which extends into an open seat in the end of the carriage and serves as a bearing for the platen shaft. The

flange of the plate is open at one side to- -through a curved slot 15 in permit the platen shaft to be moved downwardly and upwardly into and out of the bearing. 4The guard plate is secured to the end of the carriage by a` screw passing h the plete, see Fig. 4.

ln the position shown in' Figs. l and Ll, the guard plate causes the line space pawl to overrun one tooth of the line space wheel before it can engage the wheel, but as soon as the pawl clears the plate it engages the Wheel and moves it two spaces, if the lever is moved to the limit. lVhen at the completion of its movement, as seen in Fig. 5, a. rearwardly projecting part at the upper end of the pawl strikes the inner end of a. screw 0r stop le on the end of the carriage, thereby locking the pawl to the line. space wheel and preventing further movement of either the wheel or its actuating levers. lf it is desired to turn the line spare wheel three spaces, the guard plate is turned forwardly by the finger piece until the detent snaps l into the next notch, and if but a single space is desired, it is turned in the. opposite direction the corresponding distance. rl`he position of the finger piece of the guard plate always indicates the number of spaces adjusted for and the rear edge of the guard plate holds the pawl out of contact. with the wheel when not in action so that the platen can be turned baclm'al'tlly by means of the usual linger wheels at its ends. By turning the guard plate rearwardly as far as it will the pawl will be forced baclnvardly by the plate and the centralopening in the plate will be made to register with the open seat in the end of the carriage, when the platen can be lifted outof the carriage, a similar locking plate i" at the opposite end of the carriage having been correspondingly moved. for locking the platen in the carriage.

The outwardly projecting arm t of the line space lever projects over the front end ol the rack bar supporting lever h so that by rocking the line space lever in the opposite direction, that is by pulling the depending handle' to the left, the rack bar is raised out of mesh with the feed pinion and the carriage will be pulled to the left by its driving spring as far as permitted by the operator.

When the line space lever l is used simply for line spacing, the T-head thereof and the spring z' can be modified if desiredfas in' that ease the lever will be rocked in one direction only.

The line space wheel 9 is preferably of the least expensive construction, being iat and having a toothed outer edge, and it is loosely mounted on the platen shaft with its `inner face resting against the end plate of the platen.

7c is a short piece of tube on the platen shaft between the line space wheel and a linger wheel K on the end Iof the shaft. The finger wheel screws on the end of the shaft and forces ,the tube 7c against the line space wheel to frictionally lock the line space Wheel against the end ofthe platen. Thetube'c forms a journal for this end of the platen shaft. lo isa spring coiled around the platen shaft in a recess in the end of the .platen and acting to press a disk 7st against the line space wheel to vcreate a slightl friction between these parts. The disk has a projection seated iii a notch it in the end plate of the platen, see Fig. 2, to, hold the disk from turning relatively to the platenand when the line space wheel is unlocked freni the platen the friction between `the wheel and the disk is suflicient to pre- 4and by which the platen shaft can be held by one hand when turning the wheel K to lock the line space wheel to and unlock it from the platen. The line space wheel is held from accidental rotation by a suitable detent such as a roller 7c4 Fig. 4, which is carried by a spring secured to the end of the carriage. lVlien the line space wheel is unlocked by iinscrewing the finger wheel K,

lthe platen can be turned backwardly by the wheel K, or either forwardly or baclnvardly by the wheel K.

`The friction between the line space wheel and the disk l?, will ordinarily hold the platen against rotary movement while writing a line or part of a line, and by screwing iipthe finger wheel K the regular line space mechanism can be restored for use whenever desired.

I claim as my invention 1. 1n a typewriting machine., the combination of a platen and a carriage forthe same, a rocking line space lever extending foi'- wardly from the carriage, an auxiliary le- ;ver pivoted at its front end on the carriage in front of the rear end of the line space lever, a pawl pivotally mounted on the rear yend of the auxiliary lever, a line space wheel at `one end of the platen, and 'connections whereby the hnespacelever actsthrough the auxiliary .lever to cause the pawl to pull downwardly., on the rear edge of the line space wheel.

2. ,In a typewri-ting machine, the combination of a platen having a line space wheel at one end, a ,carriage for the platen, aline space lever extending forwardly from the carriage and arranged to rock on a for wardly and rearwardly extending axis, an auxiliary lever .pivoted atits front end on the carriage in front of the rear end of the line space lever, operative connections between said levers, a pawl pivotally mounted on the rear end of the auxiliary lever to act downwardly on the rear edge of this line space whee1,and an adjustable guard plate for limiting the effective action of the pawl on the line space wheel to one or inore line spaces at will.

3. In a typewriting machine, the combination of a platen havin a line space wheel on one end, a Carriage for the platen, a line space lever extending forwardly from the carriage and arranged to rock on a-substantially horizontal axis, an auxiliary line space lever pivoted at its front end on the carriage in front of the platen shaft with its free end passing rearwardly under the platen shaft and connected to an upright line space pawl, and connections between said levers whereby the pawl acts downwardly on the rear edge of' the line space wheel. y

t. In a typewriting machine, the combination of a platen having a line space wheel at one end,- a carriage for the platen, a line space lever extending forwardly from the carriage and adapted to rock\-on an axis extendingfore and aft of thecarriage and having a lateral arm at its rear end, an aux` iliary lever pivoted on'the carriage in front of the platen shaft with its free end extending rearwardly under said shaft, a ,line space pawl connected to the rear end of the auxiliary lever to actuate the line space wheel,

and a roller mounted on the auxiliary leverwhich is engaged by the arm on the. line space lever.

5. In a typewriting machine, the coinbination of a platen having a line space wheel with flat face and toothed edge on one en'd, and a carriage for the platen, a line space lever extending forwardly from the car-- riage, an auxiliary lever pivoted on the cai'- riage in front' of the vplaten, shaft, with its free rear end provided with a pawl arranged to act. downwardly on the line space wheel', and a roller mounted on the auxiliary lever between the line space wheel and inner face of the end of the carriage.

G. In a. typewriting machine, the combination Aof a platen and acairiage for the same, a line space wheel loosely mounted next to one end of the platen inside of the end of the carriage, a shaft fixed to the platen and passing loosely through the `line space wheel and having a finger wheel screwed on its outer end outside of theend of the carria ge, and asleeve arranged on the shaft between the line space wheel and the finger wheel and acting to lock the line space wheel directly to the end of theV platen when the finger wheel is screwed onto the shaft.

7. In a typewriting machine, the combi-` nation of a platen, and a carriage for the same, a line space4 Wheel loosely mounted at one end of the platen inside of the end of the carriage, a sh'aft fixed to the 'platen and passing loosely through t-he line space Wheel, a finger wheel screwed onto the end of the shaft outside of the end of the carriage, a sleeve arranged on the shaft and passing through the end of the carriage connecting the line space wheel to the tinger Wheel and acting to lock the line space Wheel directly to the platen when the finger wheel is screwed on the shaft, and a friction device between the platen and the line space wheel acting to frictionally hold the platen against turning when the finger wheel is unscrexved.

8. In a. tvpewriting machine, the combination of a platen, a carriage for the same, a line space. wheel loosely mounted on one end of the platen and normally locked directly thereto, a shaft fixed to the platen and passing loosely through the line space wheel, a finger wheel screwed on the end of the shaft, a sleeve arranged on the shaft between the line space wheel and the finger Wheel, -and a spring acting to press the line space Wheel against the end of the sleeve at all tiines.

9. In a typewriting machine, the combination of a platen, a carriage for the same, a line space wheel at one end of the platen, a. line space pawl acting on said Wheel and means for actuating the same, and a rotatably adjustable guard plate located beside the inner face of the endof the carriage and cooperating with the line space pawl for controlling the action of the pawl on the line space Wheel, and having an integral spring detent for holding the guard plate when adjusted.

10. In a typewriting machine, the combination of a platen, a. carriage therefor, a line space wheel at one end of the platen, a line -space pawl acting on said wheel, means for actuating said pawl` and a rotatably adjustable guard plate having a bearing flange seated inthe end of the :arriage and a curved part to hold the pawl out of contact with the line space wheel, said guard plate also having a radially extending opening adapted to admit the platen shaft laterally to its bearings on the carriage and being adjustable to lock the shaft in its bearings.

11. In a typewriting machine, the combination of a platenfa carriage for the same, a line space wheel` at one end of the platen, a line space pawl acting on said Wheel and means for actuating the same, and a sheel metal. plate which has a part forming a spring'detent for .holding the plate in adjusted position and which regulates the action of the pawl on the line space Wheel, and also locks the platen shaft in its bearing 'on the carriage. l

12. In a typewriting machine, the combination of'a platen, a carriage for the same, a line space Wheel at one end of the platen, a line space paWl acting on said wheel and means for actuating the paWl, and a guard plate for the pawl having a central flange Seated inthe end of the carriage and forming a bearing for the platen shaft', said flange being open on one side to admit the shaft laterally and said guard plate being adapted u to be turned in its seat in lthe end of the carriage to adjust the guard plate and lock the shaft in to the carriage.

13. ln a typewriting machine, the eon'ibination of a platen and its shaft, a line space wheel for the platen, a finger wheel for the platen movable longitudinally on the platen shaft to clamp said line space wheel against and release it from the end of the platen, a friction disk mounted at the end of the platen, and means for yieldingly pressing said disk against the line space wheel to frictionally hold thel platen against rotation when the line space wheel released there from.

14. In a type'xvriting machine, the combination of a platen, a carriage for 'the same, and a shaft supporting the platen thereon, a line space Wheel loose on said shaft at one end of the platen inside of the end of the carriage,l a finger Wheel screwing onto the end of the shaft outside of the end of the carriage, and a sleeve arranged to slide on the shaft and connect the line space Wheel to the finger wheel and forming a journal for the shaft.

15. In a typewriting machine, the combination of a platen and a carriage therefor, a line space wheel at one end of the platen, a line space lever supported on the carriage and adapted to oscillate on an axis extending fore and aft of the carriage, said lever having a laterally extending arm adjacent its 'rear end, an auxiliary lever piv'oted on the carriage between theend of the carriage and the adjacent end of the platen, a line space pawl carried by said auxiliary lever, and a roller journaled on said auxiliary lever transversely thereof and adapted to engage the adjacent ends of the carriage and platen to prevent late al movenient of the auxiliary lever when said lever is depressed by the arm on the line space lever.

16. In a typewriting machine, the combination of a platen and a carriage therefor, a line space wheel` at one end of the platen, a

line space pavvl acting on said wheel, means l for actuating said pawl, and means rotatably mounted on the platen shaft adjacent each e d of the platen for locking the platen in place on the carriage, the locking means at one end of the platen being adjustable to regulate the action of the pawl on the line space wheel.

17. In a typewriting machine, the combination of' a platen, a carriage therefor, line space Wheel at one end of Jehe pnten, a line space paw] acting on said wheel, means oraetutmg said pawl, und a plaie reta- 5 taby mounted on the platen shaft :l 11d adepted to be adjusted about thesha'ft to leek the platen in its bearings on the carriage and to regulate the nchen of the pand 011 the hue mace wheel, said plate having a part thereof forming a detent adapted to engage the ear- 10 riage and lock the plate in its adjusted'po- Stions.

Witness my hand this 2nd day of October, 1915.

., EMMIT G. LATTA.

tnessesz H. I. LATTA, L. B. LATTA. 

